{"id":130,"date":"2017-03-01T15:00:48","date_gmt":"2017-03-01T15:00:48","guid":{"rendered":"http:\/\/www.fledged.eu\/?page_id=130"},"modified":"2017-06-12T08:43:02","modified_gmt":"2017-06-12T08:43:02","slug":"gasification-2","status":"publish","type":"page","link":"https:\/\/www.fledged.eu\/biomass-to-dme-process\/gasification-2\/","title":{"rendered":"Gasification"},"content":{"rendered":"<p>Before biomass can be converted to biofuels, typically a <strong>pretreatment<\/strong> is required to dry and reduce the size through shredding and grinding.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-969 size-large aligncenter\" src=\"https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-1024x549.png\" alt=\"\" width=\"840\" height=\"450\" srcset=\"https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-1024x549.png 1024w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-300x161.png 300w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-768x412.png 768w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-1200x643.png 1200w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat-594x318.png 594w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Pretreat.png 1640w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><\/p>\n<p>After pretreatment, biomass is fed into the <strong>gasifier<\/strong> where it is converted into a synthetic gaseous fuel (syngas), mainly composed of hydrogen (H<sub>2<\/sub>), carbon monoxide (CO), methane (CH<sub>4<\/sub>), short chain hydrocarbons and other inert gases (such as CO2 and N2).<br \/>\nGasification takes place under shortage of oxygen and the processes may be distinguished according to the gasification agent used and the type of heat supply. Typical gasification agents are <em>high purity oxygen<\/em>, <em>water<\/em> and <em>air<\/em>.<br \/>\nTwo types of processes are distinguished based on how heat is supplied:<\/p>\n<ul>\n<li>In <em><strong>autothermic processes<\/strong>,<\/em> heat is provided through partial oxydation of the biomass by direct contact with oxygen.<\/li>\n<li>In <em><strong>allothermic processes<\/strong><\/em>, heat is provided externally via heat exchangers or direct contact with hot solids produced in a combustion reactor interconnected with the gasifier.<\/li>\n<\/ul>\n<p><strong>Gasifier reactors<\/strong> can be classified according to the type of gas-solid contact:<\/p>\n<ul>\n<li><em><strong>Fixed- or moving-bed gasifier<\/strong><\/em>, where relatively coarse solid biomass is gasified by the gasifying agent, while slowly moving downwards.<em><strong><br \/>\n<\/strong><\/em><\/li>\n<li><strong><em>Fluidized bed gasifier<\/em><\/strong>, where biomass and other solid materials are vigorously mixed by the gasifing agent.<strong><em><br \/>\n<\/em><\/strong><\/li>\n<li><em><strong>Entrained Flow Gasifier<\/strong><\/em>, where finely grinded solid biomass is entrained and quickly converted by the gasifing agent.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-792\" src=\"https:\/\/www.fledged.eu\/wp-content\/uploads\/Gasifier_tech.png\" alt=\"\" width=\"500\" height=\"264\" srcset=\"https:\/\/www.fledged.eu\/wp-content\/uploads\/Gasifier_tech.png 600w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Gasifier_tech-300x159.png 300w, https:\/\/www.fledged.eu\/wp-content\/uploads\/Gasifier_tech-594x314.png 594w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>After the gasifier, syngas has to be cleaned from impurities (particulate matter, tar, sulphur compounds, alkali and chlorine compounds). When syngas is used for the synthesis of fuels or chemicals, its composition has to be adjusted to meet specifications of the downstream chemical process. This is typically achieved through a water gas shift section (adjusting H2\/CO ratio) and CO<sub>2<\/sub> removal unit.<\/p>\n<p>More information can be found on <a href=\"http:\/\/biofuelstp.eu\/thermochemical-production.html\" target=\"_blank\" rel=\"noopener noreferrer\">European Biofuels Technology Platform (EBTP)<\/a>.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Before biomass can be converted to biofuels, typically a pretreatment is required to dry and reduce the size through shredding and grinding. After pretreatment, biomass is fed into the gasifier where it is converted into a synthetic gaseous fuel (syngas), mainly composed of hydrogen (H2), carbon monoxide (CO), methane (CH4), short chain hydrocarbons and other&#8230;<\/p>","protected":false},"author":2,"featured_media":621,"parent":539,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-130","page","type-page","status-publish","has-post-thumbnail","hentry","clearfix","post-index","fader"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gasification - FLEDGED<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fledged.eu\/biomass-to-dme-process\/gasification-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gasification - FLEDGED\" \/>\n<meta property=\"og:description\" content=\"Before biomass can be converted to biofuels, typically a pretreatment is required to dry and reduce the size through shredding and grinding. 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